PayPlans is a powerful membership component for Joomla. Use it for unlimited time to sell, paid membership plans! It is a commercial extension. PayPlans integration with JDownloads allows you to give access of different jDownloads groups to users as per their subscription plan.

The jDownloads special plugin for PayPlans is freely downloadable from the PayPlans "app-manager" at your site's back-end. More information can you get here.